Oxygen Analyzer | Operational Theory | |
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While the 2nd working electrode allows OH- to move through, it prevents the dissolved oxygen from the top portion of the sensor to reach the sensing electrode. The reference electrode provides a potential reference for both the sensing electrode and the 2nd working electrode.
NOTE: BDS technology and sensor is a patent pending technology of Teledyne Analytical Instruments in the United State of America as well as many foreign countries.
To learn more about BDS technology, please visit TAI’s web page at
To learn more about potentiostat, visit Electochemical Society’s web page at http://www.electrochem.org
2.2.2 Gas Flow Rate
The output from a BDS oxygen sensor is relatively insensitive to change of gas flow rate if operated in the range of 1 - 3 SCFH (in nitrogen). The output drops when the flow rate is below 1 SCFH. Figure 2.2 is a typical curve showing the sensor outputs at different flow rate.
Figure 2.2: BDS sensor output at different gas flow rate
Teledyne Analytical Instruments | 21 |
